I notice that a Warlock's Summon basic attack is +5 vs Fortitude. (from the power Summon Warlock Ally) (See here: What are the descriptions of the available creatures for Summon Warlock's Ally?) ...
I had an odd idea for a Warlock character who was pretty much under the control of his familiar. Backstory-wise, he had made a contract with an extraplanar entity that would allow it to live on the ...